diff --git a/package.json b/package.json
index 7d2f580..e56065b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ARCitect",
-  "version": "v0.0.20",
+  "version": "v0.0.21",
   "private": true,
   "engines": {
     "node": ">=v16.13",
@@ -26,7 +26,7 @@
   "dependencies": {
     "@fslab/fsspreadsheet": "latest",
     "@imengyu/vue3-context-menu": "latest",
-    "@nfdi4plants/arctrl": "1.0.0-beta.7",
+    "@nfdi4plants/arctrl": "1.0.0-beta.8",
     "@nfdi4plants/exceljs": "0.2.0",
     "@quasar/extras": "1.15.3",
     "chokidar": "3.5.1",
diff --git a/packages/renderer/src/Property.ts b/packages/renderer/src/Property.ts
index 515d45f..8ab713c 100644
--- a/packages/renderer/src/Property.ts
+++ b/packages/renderer/src/Property.ts
@@ -22,7 +22,7 @@ const autoType = property => {
     :'text';
 };
 
-const Property = (model,property,config)=>{
+const Property = (model: any,property: string, config?: any)=>{
   // console.log(property, model[property]);
   config = config || {};
   if(config.type==='ontology' && !model[property])
diff --git a/packages/renderer/src/components/InvestigationForm.vue b/packages/renderer/src/components/InvestigationForm.vue
index 8de15d8..9f8cd55 100644
--- a/packages/renderer/src/components/InvestigationForm.vue
+++ b/packages/renderer/src/components/InvestigationForm.vue
@@ -13,7 +13,7 @@ export interface Props {
 };
 const props = defineProps<Props>();
 
-const iProps = reactive({
+const iProps : {form: any [] []} = reactive({
   form: [[]]
 });
 
diff --git a/packages/renderer/src/views/ArcTreeView.vue b/packages/renderer/src/views/ArcTreeView.vue
index 9495346..909bc83 100644
--- a/packages/renderer/src/views/ArcTreeView.vue
+++ b/packages/renderer/src/views/ArcTreeView.vue
@@ -9,7 +9,7 @@ import AddProtocolDialog from '../dialogs/AddProtocolDialog.vue';
 import NewAssayDialog from '../dialogs/NewAssayDialog.vue';
 import { NewAssayInformation } from '../dialogs/NewAssayDialog.vue';
 import { useQuasar } from 'quasar'
-import {ArcStudy, ArcAssay} from '@nfdi4plants/arctrl/ISA/ISA/ArcTypes/ArcTypes.js';
+import {ARC, ArcStudy, ArcAssay} from '@nfdi4plants/arctrl';
 import NewStudyDialog from '../dialogs/NewStudyDialog.vue';
 
 const Markdown = 'markdown';
@@ -187,7 +187,6 @@ const readDir_ = async (path: string) => {
     return n.isDirectory && [Studies, Assays].includes(p);
   };
 
-
   function createAddNode (label: string, handler: ((n:any) => Promise<void>) ) {
     const node = {
       type: formatNodeAddString(label),
@@ -220,10 +219,19 @@ const readDir_ = async (path: string) => {
     }
   };
 
+  // Here check loose assays/studies ~ WIP, Kevin
+  // function checkVacantStudies() {
+  //   const arc : ARC = ArcControlService.props.arc
+  //   console.log("HIT")
+  //   if (!arc) return;
+  //   console.log(arc.ISA.RegisteredStudyIdentifiers)
+  // }
+
   if(needsAddElement(parent)) {
     switch (parent) {
       case Studies:
         let addStudyNode = createAddNode("Add Study", addStudy);
+        // checkVacantStudies()
         nodes.push(addStudyNode);
         break;
       case Assays:
@@ -333,13 +341,13 @@ const updatePath = async path => {
   debounceReadARC();
   if (!arcTree.value)
     return;
-  const n = arcTree._value.getNodeByKey(path);
+  const n = arcTree.value.getNodeByKey(path);
   if(!n)
     return;
-  const isExpanded = arcTree._value.isExpanded(path);
+  const isExpanded = arcTree.value.isExpanded(path);
   delete n.children;
   if(isExpanded)
-    arcTree._value.setExpanded(path,true);
+    arcTree.value.setExpanded(path,true);
 };
 
 const formatSize = size => {